JPS5689765A - Developing device - Google Patents
Developing deviceInfo
- Publication number
- JPS5689765A JPS5689765A JP16635379A JP16635379A JPS5689765A JP S5689765 A JPS5689765 A JP S5689765A JP 16635379 A JP16635379 A JP 16635379A JP 16635379 A JP16635379 A JP 16635379A JP S5689765 A JPS5689765 A JP S5689765A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- blade
- residual quantity
- constitution
- developer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Magnetic Brush Developing In Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
Abstract
PURPOSE:To detect residual quantity of a toner with high reliability without addition of a new element, by detecting said quantity with the developer control material. CONSTITUTION:The thickness of toner layer 11 is controlled by developer support material 8 and doctor blade 10 which is the developer control material. This doctor blade 10 is rotatable round shaft 15 as the center and the tip of said 10 is pulled by spring 16 and is provided with microswitch 17 on the back end part. By this constitution, when magnetic toner 12 is filled in a developing equipment, toner 12 flows violently by rotation of support material 8, to depress switch 17 with blade 10. Then, toner 12 is reduced gradually; and when flowing force is weakened to make the toner reached a certain residual quantity, blade 10 is separated from switch 17. Thus, the residual quantity is detected with high precision without addition of a new element.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16635379A JPS5689765A (en) | 1979-12-21 | 1979-12-21 | Developing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16635379A JPS5689765A (en) | 1979-12-21 | 1979-12-21 | Developing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5689765A true JPS5689765A (en) | 1981-07-21 |
Family
ID=15829800
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16635379A Pending JPS5689765A (en) | 1979-12-21 | 1979-12-21 | Developing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5689765A (en) |
-
1979
- 1979-12-21 JP JP16635379A patent/JPS5689765A/en active Pending
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